/* Merkys landing page: base styles and components (AAI Labs design system).
   Form language: square corners, structure carried by ink and hairline rules. */

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 72px; }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.5;
  color: var(--text-body);
  background: var(--surface-page);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--blue-600); color: var(--white); }

h1, h2, h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: var(--tracking-display);
  color: var(--text-strong);
  text-wrap: balance;
}
p { margin: 0; text-wrap: pretty; }

a { color: var(--text-accent); text-decoration: none; transition: opacity var(--duration-fast) var(--ease); }
a:hover { opacity: 0.7; }
/* Controls take the AAI Labs control radius (6px); structure stays square. */
a:focus-visible, button:focus-visible { outline: 2px solid var(--blue-600); outline-offset: 2px; border-radius: var(--radius-sm); }

.icon { display: inline-block; flex: none; }

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: var(--container-pad);
  padding-right: var(--container-pad);
}

.skip-link {
  position: absolute; left: 16px; top: -48px; z-index: 50;
  padding: 10px 14px; background: var(--ink); color: var(--white); border-radius: var(--radius-sm);
}
.skip-link:focus { top: 12px; }

/* ---------- Primitives ---------- */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  font-family: var(--font-body); font-weight: 700; line-height: 1;
  letter-spacing: var(--tracking-tight);
  border: 1.5px solid var(--color-accent); border-radius: var(--radius-sm);
  background: var(--color-accent); color: var(--color-on-accent);
  padding: 14px 26px; font-size: var(--text-base);
  cursor: pointer; white-space: nowrap; text-decoration: none;
  transition: transform var(--duration-fast) var(--ease), background var(--duration-fast) var(--ease), border-color var(--duration-fast) var(--ease), color var(--duration-fast) var(--ease);
}
.btn:hover { opacity: 1; background: var(--color-accent-hover); border-color: var(--color-accent-hover); }
.btn:active { transform: translateY(1px); }
.btn--sm { padding: 9px 16px; font-size: var(--text-sm); }
.btn--lg { padding: 18px 34px; font-size: var(--text-md); }
.btn--secondary { background: transparent; color: var(--text-strong); border-color: var(--border-strong); }
.btn--secondary:hover { background: var(--ink); color: var(--white); border-color: var(--ink); }

/* A section opens on a heavy ink rule, like a heading in a report. */
.section-title {
  padding-top: 20px;
  border-top: 2px solid var(--border-strong);
  font-size: clamp(32px, 3.6vw, 44px);
  line-height: 1.08;
}
.section-lead { margin-top: 20px; font-size: var(--text-md); line-height: 1.55; max-width: 44ch; }

/* ---------- Header ---------- */

.site-header {
  position: sticky; top: 0; z-index: 20;
  background: rgba(255,255,255,0.96);
  border-bottom: 1px solid var(--border-strong);
}
.site-header__inner {
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  padding-top: 14px; padding-bottom: 14px;
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--text-strong); }
.brand img { height: 24px; width: 24px; display: block; }
.brand span { font-family: var(--font-display); font-weight: 800; font-size: 22px; letter-spacing: var(--tracking-display); }
.site-nav { display: flex; align-items: center; gap: 28px; }
.site-nav__link { font-size: var(--text-sm); font-weight: 500; color: var(--text-body); }
.site-nav__link[aria-current="page"] { color: var(--text-strong); text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 6px; }

/* ---------- Hero ---------- */

.hero {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 440px), 1fr));
  gap: 64px; align-items: center;
  padding-top: 88px; padding-bottom: 96px;
}
.hero h1 { font-size: clamp(40px, 5.4vw, 64px); line-height: 1.02; }
.hero__lead { margin-top: 28px; font-size: 20px; line-height: 1.5; max-width: 48ch; }
.hero__actions { display: flex; gap: 12px; margin-top: 36px; flex-wrap: wrap; }

/* Claim line: three facts separated by rules, not pills. */
.hero__badges {
  display: flex; flex-wrap: wrap; row-gap: 10px; margin-top: 36px; padding-top: 16px;
  border-top: 1px solid var(--border-subtle);
}
.badge {
  font-family: var(--font-label); font-weight: 500; font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide); line-height: 1; white-space: nowrap;
}
.badge--outline { color: var(--text-strong); padding: 2px 16px; border-left: 1px solid var(--grey-300); }
.badge--outline:first-child { padding-left: 0; border-left: none; }

/* Chat mock: framed as an exhibit, square, ink-bordered. */
/* The chat is a sample of the product's own UI, so it keeps the app's rounded
   forms; the page around it stays square. */
.chat { background: var(--surface-card); border: 1px solid var(--border-strong); border-radius: var(--radius-lg); overflow: hidden; }
.chat__bar {
  display: flex; align-items: stretch; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  padding: 0 0 0 18px; background: var(--surface-ink);
}
.chat__title {
  align-self: center; padding: 14px 0;
  font-family: var(--font-mono); font-size: var(--text-xs); letter-spacing: var(--tracking-label); color: var(--grey-300);
}
.chat__tabs { display: flex; align-items: center; gap: 4px; padding: 4px 6px; }
.chat__tab {
  border: none; cursor: pointer; border-radius: var(--radius-sm);
  font-family: var(--font-body); font-size: var(--text-xs); font-weight: 500;
  min-height: 36px; padding: 0 12px;
  background: transparent; color: var(--grey-400);
  transition: background var(--duration-fast) var(--ease), color var(--duration-fast) var(--ease);
}
.chat__tab:hover { color: var(--white); }
.chat__tab[aria-selected="true"] { color: var(--white); background: var(--grey-700); }
.chat__tab:focus-visible { outline-color: var(--white); }
.chat__panel {
  display: flex; flex-direction: column; gap: 16px;
  padding: 24px 22px; min-height: 340px; background: var(--surface-subtle);
}
.chat__panel[hidden] { display: none; }

.bubble { max-width: 78%; padding: 12px 16px; border-radius: var(--radius-lg); font-size: var(--text-base); line-height: 1.5; }
.bubble--user { align-self: flex-end; background: var(--color-accent); color: var(--color-on-accent); border-bottom-right-radius: 4px; }
.bubble--agent {
  align-self: flex-start; max-width: 92%; padding: 16px 18px;
  background: var(--surface-card); color: var(--text-strong);
  border: 1px solid var(--grey-300); border-bottom-left-radius: 4px;
}
.cite { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--text-accent); }
.sources { margin-top: 14px; border-top: 1px solid var(--border-strong); font-size: 13px; }
.sources div {
  display: flex; flex-wrap: wrap; column-gap: 10px; row-gap: 0;
  padding: 7px 0; border-bottom: 1px solid var(--border-subtle);
}
.sources div:last-child { border-bottom: none; padding-bottom: 0; }
.sources .n { font-family: var(--font-mono); color: var(--text-accent); font-variant-numeric: tabular-nums; }
.sources .doc, .sources .src { color: var(--text-strong); }
.sources .src { flex: 1 1 0; min-width: 12ch; }
.sources .where { color: var(--text-muted); }

.verdict {
  display: flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: var(--text-xs); letter-spacing: var(--tracking-wide);
}
.verdict--ok { color: var(--text-accent); }
.verdict--warn { color: var(--text-warning); }

.chat__composer { padding: 14px 18px; border-top: 1px solid var(--border-subtle); background: var(--surface-card); }
.chat__input {
  display: flex; align-items: center; gap: 12px;
  border: 1px solid var(--grey-300); border-radius: var(--radius-md);
  padding: 6px 6px 6px 14px; color: var(--text-muted);
}
.chat__placeholder { flex: 1; font-size: 15px; }
.chat__send {
  flex: none; display: flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; border-radius: var(--radius-sm);
  background: var(--color-accent); color: var(--white);
}

/* ---------- Pillars strip ---------- */

.pillars { border-top: 1px solid var(--border-strong); border-bottom: 1px solid var(--border-subtle); }
.pillars__grid { display: grid; grid-template-columns: repeat(3, 1fr); }
.pillar { display: flex; flex-direction: column; gap: 12px; padding: 48px 32px; color: var(--text-body); }
.pillar:first-child { padding-left: 0; }
.pillar:last-child { padding-right: 0; }
.pillar + .pillar { border-left: 1px solid var(--border-subtle); }
.pillar .icon { color: var(--text-strong); }
.pillar h2 { margin-top: 4px; font-weight: 700; font-size: var(--text-lg); letter-spacing: var(--tracking-tight); }

/* ---------- How it works ---------- */

.how {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 420px), 1fr));
  gap: 64px; align-items: start; padding-top: 104px; padding-bottom: 104px;
}
.how__intro { position: sticky; top: 104px; }
.steps { margin: 0; padding: 0; list-style: none; border-top: 2px solid var(--border-strong); }
.step {
  display: grid; grid-template-columns: 48px 1fr; gap: 20px;
  padding: 22px 0; border-bottom: 1px solid var(--border-subtle);
}
.step:last-child { border-bottom: none; }
.step__index { font-family: var(--font-label); font-weight: 700; font-size: var(--text-md); color: var(--text-accent); font-variant-numeric: tabular-nums; }
.step h3 { margin-bottom: 6px; font-weight: 700; font-size: var(--text-lg); letter-spacing: var(--tracking-tight); }
.step p { max-width: 60ch; }

/* ---------- Features: a ruled index, one row per capability ---------- */

.features { background: var(--surface-subtle); border-top: 1px solid var(--border-subtle); }
.features__inner { padding-top: 104px; padding-bottom: 104px; }
.features__list { margin-top: 56px; border-top: 1px solid var(--border-strong); }
.feature {
  display: grid; grid-template-columns: 28px minmax(180px, 17rem) minmax(0, 1fr) minmax(140px, auto);
  gap: 8px 28px; align-items: baseline;
  padding: 28px 0; border-bottom: 1px solid var(--grey-300);
}
.feature .icon { align-self: start; color: var(--text-strong); }
.feature h3 a { color: inherit; text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 4px; }
.feature h3 { font-weight: 700; font-size: var(--text-lg); line-height: 1.25; letter-spacing: var(--tracking-tight); }
.feature p { max-width: 62ch; }
.feature .feature__tag {
  justify-self: end; text-align: right;
  font-family: var(--font-label); font-weight: 500; font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide); line-height: 1.5; color: var(--text-strong);
}

/* ---------- Sources ---------- */

.sources-section {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 380px), 1fr));
  gap: 48px; align-items: start; padding-top: 96px; padding-bottom: 96px;
}
.sources-section .section-title { font-size: clamp(28px, 3vw, 36px); line-height: 1.1; }
.sources-section .section-lead { margin-top: 16px; font-size: 17px; }
.source-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  margin: 0; padding: 0; list-style: none;
  border-top: 2px solid var(--border-strong); border-left: 1px solid var(--border-subtle);
}
.source-grid li { padding: 18px 20px; border-right: 1px solid var(--border-subtle); border-bottom: 1px solid var(--border-subtle); }
.source-grid strong { display: block; font-weight: 600; font-size: 15px; color: var(--text-strong); }
.source-grid span { display: block; margin-top: 4px; font-family: var(--font-mono); font-size: var(--text-xs); letter-spacing: var(--tracking-wide); color: var(--text-muted); }

/* ---------- Industries (home teaser): ruled rows linking to the pages ---------- */

.industries { background: var(--surface-subtle); border-top: 1px solid var(--border-subtle); }
.industries__inner { padding-top: 104px; padding-bottom: 104px; }
.industry-links { margin: 48px 0 0; padding: 0; list-style: none; border-top: 1px solid var(--border-strong); }
.industry-link {
  display: grid; grid-template-columns: 28px minmax(180px, 17rem) minmax(0, 1fr) auto;
  gap: 8px 28px; align-items: baseline; padding: 32px 0; border-bottom: 1px solid var(--grey-300);
}
.industry-link .icon { align-self: start; color: var(--text-strong); }
.industry-link h3 { font-weight: 700; font-size: var(--text-lg); line-height: 1.25; letter-spacing: var(--tracking-tight); }
.industry-link p { max-width: 62ch; }
.industry-link .btn { justify-self: end; }

/* ---------- Industry pages ---------- */

.crumbs { padding-top: 24px; }
.crumbs ol { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; list-style: none; font-size: var(--text-sm); color: var(--text-muted); }
.crumbs li + li::before { content: "/"; margin-right: 8px; color: var(--grey-300); }
.crumbs a { color: var(--text-body); }
.hero--industry { padding-top: 48px; align-items: start; }

.section { padding-top: 104px; padding-bottom: 104px; }
.section__head .section-title { max-width: none; }
.section__head .section-lead { max-width: 60ch; }
.note { margin-top: 24px; font-size: var(--text-sm); color: var(--text-body); max-width: 80ch; }

/* Problem → solution: a ruled two-column table. */
.problems__head {
  display: grid; grid-template-columns: 48px minmax(0, 1fr) minmax(0, 1fr); gap: 32px;
  margin-top: 48px; padding-bottom: 12px; border-bottom: 2px solid var(--border-strong);
  font-family: var(--font-label); font-weight: 500; font-size: var(--text-xs); letter-spacing: var(--tracking-wide); color: var(--text-muted);
}
.problems { margin: 0; padding: 0; list-style: none; }
.problem {
  display: grid; grid-template-columns: 48px minmax(0, 1fr) minmax(0, 1fr); gap: 12px 32px;
  padding: 28px 0; border-bottom: 1px solid var(--border-subtle);
}
.problem__n { font-family: var(--font-label); font-weight: 700; font-size: var(--text-md); color: var(--text-accent); font-variant-numeric: tabular-nums; }
.problem h3 { font-weight: 700; font-size: var(--text-lg); line-height: 1.25; letter-spacing: var(--tracking-tight); margin-bottom: 8px; }
.problem__fix p { color: var(--text-strong); }
.problem__tag a { font-family: var(--font-body); letter-spacing: 0; font-weight: 600; }
.problem__tag {
  display: inline-block; margin-top: 10px;
  font-family: var(--font-label); font-weight: 500; font-size: var(--text-xs); letter-spacing: var(--tracking-wide); color: var(--text-strong);
}

.features__group {
  margin-top: 56px; font-weight: 700; font-size: var(--text-lg); letter-spacing: var(--tracking-tight);
}
.features__group + .features__list { margin-top: 16px; }

/* Product screenshots are samples of the app, so they keep its 14px window. No shadow. */
.shots { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 420px), 1fr)); gap: 32px; align-items: start; margin-top: 48px; }
.shots--single { grid-template-columns: minmax(0, 960px); }
.shot { margin: 0; }
.shot__link { display: block; border-radius: var(--radius-lg); cursor: zoom-in; }
.shot__link:hover { opacity: 0.92; }
.shot img { display: block; width: 100%; height: auto; border: 1px solid var(--border-strong); border-radius: var(--radius-lg); background: var(--ink); }
.shot figcaption { margin-top: 14px; font-size: var(--text-sm); color: var(--text-body); }
.shot figcaption strong { color: var(--text-strong); font-weight: 600; }

.chat--example { margin: 0; }
.chat--example .chat__panel { min-height: 0; }
.chat__caption { padding: 10px 18px; border-top: 1px solid var(--border-subtle); font-size: 13px; color: var(--text-muted); }

/* FAQ: ruled rows that open in place. */
.faq__list { margin-top: 48px; border-top: 1px solid var(--border-strong); max-width: 900px; }
.faq__item { border-bottom: 1px solid var(--border-subtle); }
.faq__item summary {
  display: flex; justify-content: space-between; align-items: baseline; gap: 24px;
  padding: 22px 0; cursor: pointer; list-style: none;
  font-family: var(--font-display); font-weight: 700; font-size: var(--text-lg); letter-spacing: var(--tracking-tight); color: var(--text-strong);
}
.faq__item summary::-webkit-details-marker { display: none; }
.faq__item summary::after { content: "+"; flex: none; font-family: var(--font-label); font-weight: 500; color: var(--text-accent); }
.faq__item[open] summary::after { content: "−"; }
.faq__item summary:focus-visible { outline: 2px solid var(--blue-600); outline-offset: 2px; border-radius: var(--radius-sm); }
.faq__item p { padding: 0 0 24px; max-width: 70ch; }

.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

@media (max-width: 900px) {
  .industry-link { grid-template-columns: 28px minmax(0, 1fr); }
  .industry-link p, .industry-link .btn { grid-column: 2; }
  .industry-link .btn { justify-self: start; margin-top: 8px; }
  .problems__head { display: none; }
  .problems { border-top: 2px solid var(--border-strong); margin-top: 40px; }
  .problem { grid-template-columns: 40px minmax(0, 1fr); }
  .problem__fix { grid-column: 2; padding-top: 12px; border-top: 1px dashed var(--grey-300); }
}

@media (max-width: 720px) {
  .industries__inner, .section { padding-top: 72px; padding-bottom: 72px; }
  .hero--industry { padding-top: 32px; }
  .faq__item summary { font-size: var(--text-md); }
}

/* ---------- Manufacturing add-ons, in detail ---------- */

.addons-intro { background: var(--surface-subtle); border-top: 1px solid var(--border-subtle); }
.addons-intro__inner { padding-top: 104px; padding-bottom: 72px; }
.addons-index { display: grid; grid-template-columns: repeat(3, 1fr); margin: 40px 0 0; padding: 0; list-style: none; border-top: 2px solid var(--border-strong); }
.addons-index li + li { border-left: 1px solid var(--grey-300); }
.addons-index a {
  display: grid; grid-template-columns: auto 1fr; gap: 4px 16px; align-items: baseline;
  padding: 24px 24px 24px 0; color: var(--text-strong);
  font-family: var(--font-display); font-weight: 700; font-size: var(--text-lg); letter-spacing: var(--tracking-tight);
}
.addons-index li + li a { padding-left: 24px; }
.addons-index__n { grid-row: span 2; font-family: var(--font-label); font-size: var(--text-md); color: var(--text-accent); }
.addons-index__for { font-family: var(--font-body); font-weight: 400; font-size: var(--text-sm); letter-spacing: 0; color: var(--text-muted); }

.addon-band { background: var(--surface-subtle); }
.addon-detail + .addon-band, .addon-band + .addon-detail { border-top: 1px solid var(--border-subtle); }
.addon-detail__head .section-lead { max-width: 64ch; }
.addon-detail__sub { margin-top: 56px; font-weight: 700; font-size: var(--text-lg); letter-spacing: var(--tracking-tight); }

/* Flow diagram: four ruled steps joined by arrows. */
.flow { display: grid; grid-template-columns: repeat(4, 1fr); margin: 20px 0 0; padding: 0; list-style: none; counter-reset: flow; }
.flow__step { position: relative; padding: 20px 28px 0 0; border-top: 2px solid var(--border-strong); }
.flow__step + .flow__step { padding-left: 28px; }
.flow__step + .flow__step::before {
  content: "→"; position: absolute; left: -14px; top: -17px; width: 28px; text-align: center;
  background: var(--surface-page); font-family: var(--font-label); font-weight: 700; font-size: 24px; line-height: 32px; color: var(--text-accent);
}
.addon-band .flow__step + .flow__step::before { background: var(--surface-subtle); }
.flow__n { font-family: var(--font-label); font-weight: 700; font-size: var(--text-md); color: var(--text-accent); font-variant-numeric: tabular-nums; }
.flow h4 { margin: 10px 0 8px; font-family: var(--font-display); font-weight: 700; font-size: var(--text-md); letter-spacing: var(--tracking-tight); color: var(--text-strong); }
.flow p { font-size: 15px; }

.addon-detail__example {
  display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: 48px; align-items: start; margin-top: 64px;
}

/* Inside the example frames */
.steps-out { margin: 12px 0 0; padding-left: 20px; }
.steps-out li { padding: 4px 0; }
.steps-out .cite { margin-left: 4px; white-space: nowrap; }
.query-file { display: flex; align-items: center; gap: 10px; padding: 12px 14px; background: var(--surface-card); border: 1px solid var(--grey-300); border-radius: var(--radius-md); color: var(--text-strong); font-size: 15px; }
.results {
  width: 100%; border-collapse: separate; border-spacing: 0; table-layout: fixed;
  background: var(--surface-card); border: 1px solid var(--grey-300); border-radius: var(--radius-md); font-size: 14px;
}
.results th, .results td { padding: 10px 12px; text-align: left; vertical-align: top; border-top: 1px solid var(--border-subtle); color: var(--text-body); }
.results th {
  border-top: none; border-bottom: 1px solid var(--border-strong);
  font-family: var(--font-label); font-weight: 500; font-size: var(--text-xs); letter-spacing: var(--tracking-wide); color: var(--text-muted);
}
.results tbody tr:first-child td { border-top: none; }
.results th:nth-child(1), .results td:nth-child(1) { width: 36px; }
.results th:nth-child(3), .results th:nth-child(4), .results th:nth-child(5) { width: 76px; }
.results--report th:nth-child(1) { width: 72px; }
.results--report th:nth-child(3) { width: 120px; }
.results strong { color: var(--text-strong); font-weight: 600; }
.results__score { color: var(--text-accent); font-weight: 600; }
.results__fail, .results__warn { font-family: var(--font-label); font-size: var(--text-xs); letter-spacing: var(--tracking-wide); font-weight: 500; }
.results__fail { color: var(--text-strong); }
.results__warn { color: var(--text-warning); }

/* Facts: a ruled definition list beside the example. */
.facts { margin: 0; border-top: 1px solid var(--border-strong); }
.facts div { padding: 18px 0; border-bottom: 1px solid var(--border-subtle); }
.facts dt { font-family: var(--font-label); font-weight: 500; font-size: var(--text-xs); letter-spacing: 0.1em; color: var(--text-muted); }
.facts dd { margin: 6px 0 0; }
.facts--compact { margin-top: 32px; }
.checks__title { font-family: var(--font-display); font-weight: 700; font-size: var(--text-md); letter-spacing: var(--tracking-tight); color: var(--text-strong); }
.checks { margin: 12px 0 0; padding: 0; list-style: none; counter-reset: check; border-top: 1px solid var(--border-strong); }
.checks li { counter-increment: check; display: grid; grid-template-columns: 32px 1fr; padding: 9px 0; border-bottom: 1px solid var(--border-subtle); }
.checks li::before { content: counter(check); font-family: var(--font-label); font-weight: 700; color: var(--text-accent); font-variant-numeric: tabular-nums; }

@media (max-width: 1000px) {
  .flow { grid-template-columns: 1fr 1fr; row-gap: 32px; }
  .flow__step:nth-child(3) { padding-left: 0; }
  .flow__step:nth-child(3)::before { display: none; }
  .addon-detail__example { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .addons-intro__inner { padding-top: 72px; padding-bottom: 56px; }
  .addons-index { grid-template-columns: 1fr; }
  .addons-index li + li { border-left: none; border-top: 1px solid var(--grey-300); }
  .addons-index li + li a { padding-left: 0; }
  .flow { grid-template-columns: 1fr; }
  .flow__step, .flow__step + .flow__step { padding: 20px 0 0; }
  .flow__step + .flow__step::before { content: "↓"; display: block; left: 0; }
  .flow__step:nth-child(3)::before { display: block; }
  .results:not(.results--report) th:nth-child(3), .results:not(.results--report) td:nth-child(3),
  .results:not(.results--report) th:nth-child(4), .results:not(.results--report) td:nth-child(4) { display: none; }
  .results--report th:nth-child(3) { width: 96px; }
}

/* ---------- Deployment ---------- */

.deployment { background: var(--surface-ink); color: var(--grey-300); }
.deployment__inner {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 420px), 1fr));
  gap: 64px; align-items: start; padding-top: 104px; padding-bottom: 104px;
}
.deployment .section-title { color: var(--white); border-top-color: var(--white); }
.deployment .section-lead { color: var(--grey-300); }
.specs { margin: 0; border-top: 2px solid var(--white); }
.spec {
  display: grid; grid-template-columns: minmax(110px, 160px) 1fr; gap: 24px;
  padding: 18px 0; border-bottom: 1px solid rgba(255,255,255,0.18);
}
.spec:last-child { border-bottom: none; }
.spec dt { font-family: var(--font-mono); font-size: var(--text-xs); letter-spacing: 0.1em; color: var(--grey-400); padding-top: 3px; }
.spec dd { margin: 0; color: var(--white); }

/* ---------- Contact: a solid Signal Blue field ---------- */

.contact { padding-top: 104px; padding-bottom: 104px; }
.cta {
  display: flex; justify-content: space-between; align-items: flex-end; gap: 32px; flex-wrap: wrap;
  padding: 56px; background: var(--color-accent); color: var(--blue-100);
}
.cta__copy { max-width: 36rem; }
.cta h2 { font-size: clamp(28px, 3vw, 40px); line-height: 1.1; color: var(--white); }
.cta p { margin-top: 16px; font-size: var(--text-md); line-height: 1.55; }
.cta .btn { background: var(--white); color: var(--text-accent); border-color: var(--white); }
.cta .btn:hover { background: var(--ink); color: var(--white); border-color: var(--ink); }
.cta .btn:focus-visible { outline-color: var(--white); }

/* ---------- Footer ---------- */

.site-footer { border-top: 1px solid var(--border-strong); }
.site-footer__inner {
  display: flex; justify-content: space-between; align-items: center; gap: 20px; flex-wrap: wrap;
  padding-top: 36px; padding-bottom: 36px;
}
.site-footer__brand { display: flex; align-items: center; gap: 14px; }
.site-footer__brand strong { font-family: var(--font-display); font-weight: 800; font-size: var(--text-md); letter-spacing: var(--tracking-display); color: var(--text-strong); }
.site-footer__brand span { font-size: var(--text-sm); color: var(--text-muted); }
.site-footer__brand .wordmark { height: 18px; width: auto; display: block; }
.site-footer__links { display: flex; gap: 20px; flex-wrap: wrap; font-family: var(--font-mono); font-size: var(--text-xs); }
.site-footer__links a { color: var(--text-body); }
.site-footer__legal {
  display: flex; justify-content: space-between; align-items: center; gap: 12px 20px; flex-wrap: wrap;
  padding-top: 20px; padding-bottom: 28px; border-top: 1px solid var(--border-subtle);
  font-size: 13px; color: var(--text-muted);
}
.site-footer__legal nav { display: flex; gap: 20px; flex-wrap: wrap; }
.site-footer__legal a { color: var(--text-muted); }
.site-footer__legal a:hover { color: var(--text-strong); opacity: 1; }

/* ---------- Document pages (privacy, terms, 404) ---------- */

.doc { max-width: 760px; min-height: 60vh; padding-top: 80px; padding-bottom: 104px; }
.doc h1 { font-size: clamp(36px, 4.4vw, 52px); line-height: 1.05; }
.doc__meta { margin-top: 16px; font-family: var(--font-mono); font-size: var(--text-xs); letter-spacing: var(--tracking-wide); color: var(--text-muted); }
.doc__lead { margin-top: 24px; font-size: var(--text-md); line-height: 1.55; }
.doc h2 {
  margin-top: 56px; padding-top: 20px; border-top: 2px solid var(--border-strong);
  font-size: 26px; line-height: 1.15;
}
.doc h3 { margin-top: 28px; font-size: var(--text-md); font-weight: 700; letter-spacing: var(--tracking-tight); }
.doc p, .doc ul, .doc ol, .doc table { margin-top: 14px; }
.doc ul, .doc ol { padding-left: 22px; }
.doc li + li { margin-top: 6px; }
.doc strong { color: var(--text-strong); font-weight: 600; }
.doc a:not(.btn) { text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; }
.doc table { width: 100%; border-collapse: collapse; font-size: 15px; }
.doc th, .doc td { text-align: left; vertical-align: top; padding: 12px 12px 12px 0; border-bottom: 1px solid var(--border-subtle); }
.doc th { font-family: var(--font-mono); font-size: var(--text-xs); font-weight: 500; letter-spacing: var(--tracking-wide); color: var(--text-muted); text-transform: uppercase; border-bottom-color: var(--border-strong); }
.doc .table-wrap { overflow-x: auto; }
.doc__actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 36px; }

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
  .pillars__grid { grid-template-columns: 1fr; }
  .pillar, .pillar:first-child, .pillar:last-child { padding: 32px 0; }
  .pillar + .pillar { border-left: none; border-top: 1px solid var(--border-subtle); }
  .how__intro { position: static; }
  .feature { grid-template-columns: 28px minmax(0, 1fr); }
  .feature p, .feature .feature__tag { grid-column: 2; }
  .feature .feature__tag { justify-self: start; text-align: left; margin-top: 6px; }
}

@media (max-width: 720px) {
  :root { --container-pad: 16px; }
  .site-nav__link { display: none; }
  .site-nav .btn--sm { min-height: 44px; }
  .hero { padding-top: 48px; padding-bottom: 64px; gap: 48px; }
  .hero__lead { font-size: var(--text-md); }
  .hero__badges { flex-direction: column; row-gap: 0; padding-top: 0; }
  .badge--outline, .badge--outline:first-child { padding: 12px 0; border-left: none; border-bottom: 1px solid var(--border-subtle); }
  .how, .features__inner, .deployment__inner, .contact { padding-top: 72px; padding-bottom: 72px; }
  .sources-section { padding-top: 72px; padding-bottom: 72px; }
  .features__list { margin-top: 40px; }
  .chat__bar { padding-left: 14px; }
  .chat__panel { padding: 20px 16px; }
  .bubble--user { max-width: 88%; }
  .bubble--agent { max-width: 100%; }
  .spec { grid-template-columns: 1fr; gap: 6px; }
  .cta { padding: 32px 24px; }
  .btn--lg { padding: 16px 26px; font-size: var(--text-base); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}

@media (max-width: 720px) {
  .doc { padding-top: 48px; padding-bottom: 72px; }
  /* Stack table rows into labelled blocks on narrow screens. */
  .doc table, .doc tbody, .doc tr, .doc td { display: block; }
  .doc thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
  .doc tr { padding: 16px 0; border-bottom: 1px solid var(--border-subtle); }
  .doc td { padding: 4px 0; border: none; }
  .doc td::before {
    content: attr(data-label); display: block; margin-bottom: 2px;
    font-family: var(--font-mono); font-size: var(--text-xs); letter-spacing: var(--tracking-wide);
    text-transform: uppercase; color: var(--text-muted);
  }
}